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Enlace: http://webexhibits.org/causesofcolor/

Descripción: Institute for Dynamic Educational Advancement (IDEA).
«Scholars have learned that all the colors in the universe originate from a mere fifteen fundamental physical causes. These causes appear over and over, lending color to the world around us. Some common causes seem logical -- for example, both light bulbs and candles are colored by incandescence -- and others are surprising -- did you know that the colors of peacock feathers and bubbles are both caused by interference?»